God allows us to experience the low points of life in order to teach us lessons that we could learn in no other way.
To see and appreciate the soul of others with whom you are in a relationship is a higher state of awareness. To see only their outer characteristics provides a limited and incomplete perspective. Their current personality, just like their current physical body, is a temporary manifestation. They have had many bodies and many personalities but only one enduring soul, only one continuous spiritual essence. See this essence and you will see the real person.